After a civilian helicopter crashed near this U.S. military base and insurgents claimed to have murdered its only survivor, U.S. forces announced what they described as a breakthrough in the case: Tips from Iraqis that led to the arrests of 10 suspects. But if the U.S. military is getting better intelligence these days in Iraq, it appears that the militants are too. A recent surge in attacks against Iraqi officials and security forces, Shiite civilians and U.S. troops indicates rebels are successfully using informants to plan such assaults.Full Story